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TAS5731MPHPR bảng dữ liệu(PDF) 39 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  2 * 30-W DIGITAL AUDIO POWER AMPLIFIER WITH DSP AND 2.1 MODE
PDF  68 Pages
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TAS5731MPHPR bảng dữ liệu(HTML) 39 Page - Texas Instruments

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background image
2
s
m
2
s
m
AVDD/DVDD
PDN
PVDD
RESET
T0420-05
3V
8V
6V
I C
2
2ms
0ns
0ns
0ns
TAS5731M
www.ti.com
SLOS838B – JULY 2013 – REVISED NOVEMBER 2013
Figure 66. Power-Loss Sequence
Initialization Sequence
Use the following sequence to power up and initialize the device:
1.
Hold all digital inputs low and ramp up AVDD/DVDD to at least 3 V.
2.
Initialize digital inputs and PVDD supply as follows:
•
Drive RESET = 0, PDN = 1, and other digital inputs to their desired state while ensuring that
all are never more than 2.5 V above AVDD/DVDD. Wait at least 100 µs, drive RESET = 1,
and wait at least another 13.5 ms.
•
Ramp up PVDD to at least 8 V while ensuring that it remains below 6 V for at least 100 µs
after AVDD/DVDD reaches 3 V. Then wait at least another 10 µs.
3.
Trim oscillator (write 0x00 to register 0x1B) and wait at least 50 ms.
4.
Configure the DAP via I2C (see User's Guide for typical values).
5.
Configure remaining registers.
6.
Exit shutdown (sequence defined below).
Normal Operation
The following are the only events supported during normal operation:
1.
Writes to master/channel volume registers
2.
Writes to soft-mute register
3.
Enter and exit shutdown (sequence defined below)
Note: Event 3 is not supported for 240 ms + 1.3 × tstart after trim following AVDD/DVDD power-up ramp
(where tstart is specified by register 0x1A).
Copyright © 2013, Texas Instruments Incorporated
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